Printing large posters on letter size paper

David,

I've seen this question come up occasionally on the Web. I can't remember it coming up before on this forum.

There is not a good way to "automate" such a "tiling" process in Photoshop. You can do it manually by selecting the various sections needed for each "tile" of the printing process, copying them and pasting into a new Photoshop document for printing, one by one. Setting up rules to divide up the original large document makes this easier, but it's still a manual process.

Page layout programs such as Quark XPress and InDesign, even Illustrator have the ability to "tile" the printed output exactly in the way you need. Take the Photoshop document into one of those to do the job. They also compensate for the fact that most printers don't print to the edge of the sheet by automating the necessary overlap needed when assembling the composite poster.

Rich